Stove construction



P 1945- I A. NELSON ETAL ,373,

STOVE CONSTRUC'ILION Original Filed Jan. 13, 1941 2 Sheets-Sheet l P 1945. A. NELSON ETAL I STOVE CONSTRUCTION.

Original Filed Jan. 13, 1941 2 Sheets-Sheet 2 I N V EN TOR5- daerd Mafia/z BYHamZaf/A/zeman z,

Patented Apr. 10, 1945 STOVE CONSTRUCTION Averd Nelson and Harold H. Niemann, Wisconsin Rapids, Wis, assignors to Prentiss Wabers Prod- -ucts 00., Wisconsin Ra of Wisconsin pids, Wis., a corporation Original application January 13, 1941, Serial No.

374,214. Divided and this application April 1, 1942, Serial No. 437,232

2 Claims.

This invention relates to a new and improved portable stove, and more particularly to a stove of this character operated by vaporization of liquid hydrocarbons.

This application is a division of applicants copending application, Serial No. 374,214, filed January 13, 1941, now Patent No. 2,302,880, November 24, 1942. I

It is an object of the present invention to provide a compact and readily portable stove composed largely of sheet metal parts and light in weight.

It is also an object to provide a stove with the burner so located relative to the housing in use that air openings in the bottom of the housing are unnecessary for efficient operation.

It is an additional object to providea stove manifold comprising interlocked sheet metal parts with a flat upper face and burners welded thereto.

It is a further object to provide an efficient stove composed of but few and simple parts and 7 adapted for commercial production.

Other and further objects will appear as the description proceeds.

We have shown certain preferred embodiments of our invention in the accompanying drawings, in which-' Figure 1 is a plan view of the stove in open operating condition;

Figure 2 is a section taken on line 22 of Figure 1;

Figure 3 is a fragmentary section on an enlarged scale, taken on line 33 of Figure 1;-and

Figure 4 is a fragmentary section on an enlarged scale, taken on line 4-4 of Figure 1.

The stove is housed in a two-part housing memher or box which comprises the base or bottom member ll and the upper or cover member I2.

These members II and I2 are of greatest depth adjacent their connection by means of the hinges l3, and of substantially lesser depth at their opposite edges. The members I l and 12 may be releasablysecured together by means of the latch I4 and the stove may be carried by the bail or handle 15.

The housing members H and I2 are preferably formed of metal stampings and have the outwardly embossed sections 18 and I 9 formed thereon, these serving not only to add to the appearance of the housing, but also to stiffen the housing members, and to render them morev rigid.

The stove enclosed in the housing is shown in operating position in Figures 1 and 2. The housing member H is swung down to rest on the passage through the spider.

portions 1-9 and also-upon the bail or handle I which is turned downwardly as clearly shown in Figure 2. The member 12 is swung upwardly at .fiat, this member having inturned edges 24 crimped around in substantially gas-tight contact with the outturned flanges 22 of the lower member. s

The manifold is supported from the inner face of member H by means of the bracket 25. This bracket 25 is provided with'spaced upturned ends 26 and 21 which are each formed with an arcuate recess 28 to receive the manifold. The upturned ends 25 and 21 are provided with ears 29 and 30 which engage the upper face of the manifold to hold it firmly in place. It will be apparent that since thebracket 25 is formed of sheet metal,'the ears 29 and 30 may be readily bent to permit insertion of the manifold, and when returned to position after insertion of the manifold will rigidly hold the parts in assembled relation. The means for supporting the manifold forms the subject matter of an application for Letters Patent filed by the present applicants on April 7, 1944,

4 Serial No. 529,948.

The upper plate 23 of the'manifold is provided with an opening 3| having an upwardly embossed wall having a downturned edge, as shown in Figure 2, and a main burner 32 is spot-welded to the manifoldconcentric with the opening 3|. The second burner 33, shown in detailed cross-section in Figure 4, is provided with a bottom plate 34 which is also spot-welded to the upper plate 23.0f the manifold. The plate 23 is upwardly embossed as shown inFigure 4. The plate 34 has an opening fittedaround an integrally formed spider portion 35 through which passes the valve stern 36 carrying the valve 31 for closing off the Said valve 31 rests upon the upwardly embossed portion of the plate 23. The lower manifold member 2! has a valve stem opening formed therein, with the valve guide flange 38 extruded inwardly. This inwardly extruded valve guide also serves to prevent leakage of liquid fuel which may condense at this point.

The bracket 39 is spot-welded to the lower portion of the burner plate 34 and pivotally supports the valve actuating bell crank lever 45 which has a portion fitting in the groove 4| formed in the valve stem 36. The lever 40 also has an upturned ing very fine perforations for the passage of the combustible gas. The L-shaped foot of the man-' ifold carries the Venturi member 41 which is shown in the form of a casting having a lower end 48 fitting through an opening in the upper manifold plate 23. This casting isprovided with a flange 49 resting on a gasket "50 and is held in place by collar preferably formed of stamped metal and having ears bent overv against the upper side of the flange of the manifold. The rear of the manifold assembly is supported at this point by the clip 52, which isspot-welde'd to the inner face of the bottom of housing member H.

The air intake shield 53 is fitted on the manifoldbetween the Venturi member 41 and the burner 32, and is provided with an opening receiving thesmall end of the Venturi member 41. An air intake opening 54 is located below the venturi, and an inturned flange 55 forms an openin to receive the end 56 of the gas generator tube 51. The member 53, therefore, serves asa combination generator support, air intake shield and Venturi support. This member is held in place on the manifold by inturned ears, one of which is indicatedat 58.

The gasoline tank 59 is provided with the usual filler plug 60 and supports the valve body. 61, which in turn supports the generator tube 51, which, as shown in Figures 11 and 2, is located above the burner 33. This valve body 6! is shown asprovided with the usual main control valve 62 and the starter valve 63. The particular structure of these valves forms no part of the present invention The tank 59 has welded thereto the supporting bracket 54. This bracket 64 has an upperinwardly extending portion 65 with an inturned end adapted to hookover the edge of housing member I l, as shown in Figure 2. In ad-, dition, the bracket is provided with a lower in- Wardly extending flange 66 which is notched toengage the end portions of the bail 15. These notches, fitting over the bail, serve to firmly hold the bail in place as a support for the stove and also to maintain the tank and generator tube assembly in'proper assembled relation and alignment with the venturi and burner assembly. It will be noted that the size of the bail is such that when it is in the position of Figure 2 the burners are brought to a horizontal position with the portion of the housing member I l adjacent the bail held up above the adjacent support.

The grate 6'! is pivotally supported from the housing member If by mean of hinges 68, shown in Figural; This grate as shown in Figure 2 has an arcuate portion and downturned portion adjacent the bottom of the housing, with a flat serves as a heat baffle and a, burner shield to' shield the burners from wind blowing in from the front of the stove.

The housing member I2 is held in upright position, as shown in Figure 2, by means of the windshield wings H, H, These wings are supported from the member l2. by pivots 12 formed integrally with the wings and fitting in perforated support lugs 13 struck inwardly from the wall of the housing member l2. The wings are also provided with integral struckup stop members 14. These members 14 are adapted to engage the adjacent end walls of the member l2 to put the wings under tension when they are in operating position. They are placed in operating position by being swung outwardly, as shown in Figure l, and. notch portions 15 are then hooked over the upper edge of the bottom member ll. Since the wings are formed of resilient sheet metal, the stops [4 act to resiliently hold the notches I5 in engagement and maintain the parts in assembled relation. I

- The stove, when. in operative position, is rigidly supported at its front end by the bail 15, which is positively locked and held in position by the bracket Mcarried by the tank. Due ,to the comparatively shallow depth of the bottomhousing when in this position, it is unnecessary to provide openings in the housing to admit air for comportion extending over the burners when the bustion. The burners, are located above the actual edge of the supporting portion of th housing, and the grate is located in such position that adequate air may come in around the burners. The burners are shielded in front by the hinged support member 69. The lateral shields are compact and serve also to sup-port the upper housing member in its vertical position.

It will be noted thatthe stove as shown includes only a single casting, that being the Venturi member M. All ofthe remaining parts are formed of sheet metal stampings which may be held in assembled relationship by spot-welding. The design reduces the number of parts necessary to a minimum, and these parts may be inexpensively andrapidly produced by commercial processes. The manifold is formed of two stampings, having an upper fiat sheet metal member to which the burners may readily be welded to secure an effectively gas-tight connection. This welded manifold maybe cheaply constructed and substantially reduces the weight of the stove over that which would be required by a cast iron manifold. The burner assembly is rigidly supported in the housing by the bracket 25 and the rear bracket 52. It may, however, b readily removed by bending the retaining lugs on bracket 25. Its original assembly is effected quickly and easily by means of these lugs. The inwardly extruded valve guide at the second burner effectively traps in the manifold any gas condensed at this point. The upper flat manifold member has upwardly embossed portions over which the openingsin the burner bottom plates 34 fit to make effective the gas-tight joint with these bottom plates when these are welded on the upper manifold member.

While we have shown certain preferred embodiments of our invention, these are to be un derstood to be illustrative only and we contemplate such changes and modifications as come within .thespirit and scope of the appended claims.

What is claimed is: i

1. In combination, a manifold, said manifold comprising two metal members with the lower member concave upwardly and the upper'member substantially flat, said upper member being-of ing as a support for the other end of said venturi, said sheet metal member having an air intake opening formed therein, a tank, and a generator tube for conducting fuel from said tank to said Venturi member, said generator tube being located above one of said burners, said sheet metal member having an opening receiving and supporting said generator tube in operative relationship withsaid other end of said Venturi 10 member. I

HAROLD H. NIEMANN. AVERD NELSON. 

